Data Sheet
February 1999
LG1602 Decision Circuit
Features
s
s
s
s
Functional Description
The LG1602 is a gallium arsenide (GaAs) decision
circuit. It features a sensitive broadband input ampli-
fier and a D-type flip-flop that retimes and regener-
ates an input data stream that is weakened by noise,
jitter, and intersymbol interference.
The LG1602 has complementary 50
鈩?/div>
output buff-
ers.
dc feedback ensures input threshold control for input
levels as low as 25 mV, when using dc balanced
input data. The LG1602 is available in a hermetically
sealed 16-lead glass-metal surface-mount package.
V
+OUT
V
鈥揙UT
Operation up to 3 Gbits/s
Good sensitivity to low input signals
Low power dissipation
Surface-mount package
Applications
s
s
s
SONET/SDH transmission systems
Digital video transmission
Digital test instruments
V
鈥揜EF
V
鈥揑N
V
+IN
V
+REF
110 pF
25 k鈩?/div>
50
鈩?/div>
D
50
鈩?/div>
25 k鈩?/div>
110 pF
D
Q
V
SS
2 pF
V
鈥揅LK
50
鈩?/div>
50
鈩?/div>
V
+CLK
2 pF
GND
5-7667(F)r.3
Figure 1. LG1602 Functional Diagram
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